f2fs: show simple call stack in fault injection message

Previously kernel message can show that in which function we do the
injection, but unfortunately, most of the caller are the same, for
tracking more information of injection path, it needs to show upper
caller's name. This patch supports that ability.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

8 files changed, 32 insertions, 13 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index cd71321..04d7c24 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -494,6 +494,7 @@ int acquire_orphan_inode(struct f2fs_sb_info *sbi)
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 	if (time_to_inject(sbi, FAULT_ORPHAN)) {
 		spin_unlock(&im->ino_lock);
+		f2fs_show_injection_info(FAULT_ORPHAN);
 		return -ENOSPC;
 	}
 #endif
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9e51c5e..b0a2e3f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -55,8 +55,10 @@ static void f2fs_read_end_io(struct bio *bio)
 	int i;
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO))
+	if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) {
+		f2fs_show_injection_info(FAULT_IO);
 		bio->bi_error = -EIO;
+	}
 #endif
 
 	if (f2fs_bio_encrypted(bio)) {
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 54aa30e..295a223 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -549,8 +549,10 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
 
 start:
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH))
+	if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH)) {
+		f2fs_show_injection_info(FAULT_DIR_DEPTH);
 		return -ENOSPC;
+	}
 #endif
 	if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
 		return -ENOSPC;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index d1156cd..8c0916a 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -952,6 +952,10 @@ struct f2fs_sb_info {
 };
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
+#define f2fs_show_injection_info(type)				\
+	printk("%sF2FS-fs : inject %s in %s of %pF\n",		\
+		KERN_INFO, fault_name[type],			\
+		__func__, __builtin_return_address(0))
 static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
 {
 	struct f2fs_fault_info *ffi = &sbi->fault_info;
@@ -965,10 +969,6 @@ static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
 	atomic_inc(&ffi->inject_ops);
 	if (atomic_read(&ffi->inject_ops) >= ffi->inject_rate) {
 		atomic_set(&ffi->inject_ops, 0);
-		printk("%sF2FS-fs : inject %s in %pF\n",
-				KERN_INFO,
-				fault_name[type],
-				__builtin_return_address(0));
 		return true;
 	}
 	return false;
@@ -1277,8 +1277,10 @@ static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
 	blkcnt_t diff;
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(sbi, FAULT_BLOCK))
+	if (time_to_inject(sbi, FAULT_BLOCK)) {
+		f2fs_show_injection_info(FAULT_BLOCK);
 		return false;
+	}
 #endif
 	/*
 	 * let's increase this in prior to actual block count change in order
@@ -1518,8 +1520,10 @@ static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
 	if (page)
 		return page;
 
-	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC))
+	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC)) {
+		f2fs_show_injection_info(FAULT_PAGE_ALLOC);
 		return NULL;
+	}
 #endif
 	if (!for_write)
 		return grab_cache_page(mapping, index);
@@ -1995,8 +1999,10 @@ static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
 					size_t size, gfp_t flags)
 {
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(sbi, FAULT_KMALLOC))
+	if (time_to_inject(sbi, FAULT_KMALLOC)) {
+		f2fs_show_injection_info(FAULT_KMALLOC);
 		return NULL;
+	}
 #endif
 	return kmalloc(size, flags);
 }
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 6c996e3..8be5144 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -48,8 +48,10 @@ static int gc_thread_func(void *data)
 		}
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-		if (time_to_inject(sbi, FAULT_CHECKPOINT))
+		if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
+			f2fs_show_injection_info(FAULT_CHECKPOINT);
 			f2fs_stop_checkpoint(sbi, false);
+		}
 #endif
 
 		/*
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index af06bda..24bb821 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -373,8 +373,10 @@ void f2fs_evict_inode(struct inode *inode)
 		goto no_delete;
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(sbi, FAULT_EVICT_INODE))
+	if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
+		f2fs_show_injection_info(FAULT_EVICT_INODE);
 		goto no_delete;
+	}
 #endif
 
 	remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 43d35ec..24ea49f 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1987,8 +1987,10 @@ bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
 	struct free_nid *i = NULL;
 retry:
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(sbi, FAULT_ALLOC_NID))
+	if (time_to_inject(sbi, FAULT_ALLOC_NID)) {
+		f2fs_show_injection_info(FAULT_ALLOC_NID);
 		return false;
+	}
 #endif
 	spin_lock(&nm_i->nid_list_lock);
 
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 9eb6d89..1bab090 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -352,8 +352,10 @@ int commit_inmem_pages(struct inode *inode)
 void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
 {
 #ifdef CONFIG_F2FS_FAULT_INJECTION
-	if (time_to_inject(sbi, FAULT_CHECKPOINT))
+	if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
+		f2fs_show_injection_info(FAULT_CHECKPOINT);
 		f2fs_stop_checkpoint(sbi, false);
+	}
 #endif
 
 	if (!need)